/*
 * Copyright 2022 The Open Islands Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.openislands.oi.console.config.completer;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

import org.jline.reader.Candidate;
import org.jline.reader.Completer;
import org.jline.reader.LineReader;
import org.jline.reader.ParsedLine;


public class FirstCompleter implements Completer {
    private final Collection<Candidate> candidates = new ArrayList<>();

    public FirstCompleter(Candidate... candidates) {
        this.candidates.addAll(Arrays.asList(candidates));
    }

    public void complete(LineReader reader, final ParsedLine commandLine, final List<Candidate> candidates) {
        // Process only when there is only empty command
        if (reader.getBuffer().toString().trim().isEmpty()) {
            candidates.addAll(this.candidates);
        }
    }

}
